Orbital changes warmed the earth's interglacial periods

Moderator: Astro

Reageer
Berichten: 2.504

Orbital changes warmed the earth's interglacial periods

http://arstechnica.com/science/news/2010/0...ial-periods.ars


Scientists think they have a pretty good idea of how orbital variations drive the glacial cycles that have dominated Earth's recent history. Periodic changes in the Earth's rotational tilt and orientation, called Milankovitch cycles, alter how sunlight gets distributed over the planet's surface, driving the advance and retreat of ice sheets. But some of the details of how this system operates remain a bit hazy, and researchers have been puzzled by a transition called the Mid-Brunhes Event, which took place 430,000 years ago. Before the Mid-Brunhes, even the warm interglacials were colder than the present, with significant ice sheets left behind; afterwards, the conditions were similar to our current ones
"Invisible Pink Unicorns are beings of great spiritual power. We know this because they are capable of being invisible and pink at the same time. Like all religions, the Faith of the Invisible Pink Unicorns is based upon both logic and faith. We have faith that they are pink; we logically know that they are invisible because we can't see them."

Reageer